NonStop S-Series Planning and Configuration Guide (G06.26+)

HP NonStop S-Series Planning and Configuration Guide—523303-017
7-1
7
Enclosure Arrangements and Cable
Connections
This section discusses arrangements and cable connections for NonStop S-series
system enclosures.
Considerations for Enclosure Arrangements
System enclosures can be arranged to fit the space available in your computer room.
You can arrange your enclosures in single-high or double-high stacks, and in multiple
rows.
When you plan how to arrange system enclosures:
•
Enclosures can be stacked. However, system enclosures must not be stacked
more than two high.
•
You can simplify ServerNet cabling by arranging enclosures appropriately. You can
minimize cable lengths by arranging connected enclosures close to each other.
See the following pages for suggested arrangements.
•
If you arrange enclosures in multiple rows, your computer room should be
equipped with either a raised floor or overhead cable troughs.
A multiple-row system has cables that connect between the rows. If these cables
are not routed beneath a raised floor or in overhead cable troughs, they would lie
on the floor across the service aisle, creating a hazard.
Even if you have overhead cable troughs, you should also have a raised floor so
that you can connect your system to a signal reference grid. You must allow at
least 48 inches for service clearance between rows.
•
To ensure signal integrity, a multiple-row system should be connected to a signal
reference grid. See Requirements for Grounding on page 7-12.
Considerations for Enclosure Arrangements 7-1
Choosing ServerNet Cable Lengths 7-4
Power-On Cables 7-10
Requirements for Grounding 7-12
Considerations for Expanding a System 7-13
Note. IOAM enclosures can replace I/O enclosures in group 01 of cabling diagrams. For
important configuration restrictions, refer to IOAM Enclosures
on page 4-69.
Note. IOAM enclosure installation and cabling information is available to your HP trained
service provider in the Modular I/O Installation and Configuration Guide.